Coffee-roaster.



` Patented Fb; 25, |902.y

sis.

E. LHUBEBRYY COFFEE RASEB. (Application @ed July 112, i901.)

(No Model.)

tl'ivrrno 'STATES PATEN Ferca,

EDGAR LINABERRY, OF DES MOINES, IOWA.

COFFEE-ROASTER.

SPECIFCATON forming part of Letters Patent No. 693,873, dated February 25, 41902.

Application filed July1 12, 1901. Serial No, 68,035. (No inodel-l tudiual seclioual View of the complete ma- ,y

To (UZ U17/,mn it muy crm/cern.-

Be it known that I, EDGAR LINABERRY, a citizen of the United States, residing,r at Des Moines, in the county of 'Polk and State of Iowa, have invented certain new and useful Improvements in Coffee-Roasters, of which the following is a specification.

lleretofore coffeeroasters have usually been provided with a housing containing a lire-box and draft-openings, together with a rotatingl cylinder to contain the coliee, and mounted in the housing in such a manner that the flame from the lire would strike its outer surface. ln roasters of this kind it has been found. that a comparatively great length of time has been required to roast the coffee thoroughly, because the heated air inside ol.l the coIfee-cylinder'could not circulate freely, and it is well known that the best results :ore obtained by the use ot' heated air.

.Illy object is to provide a machine of this class in which the coffee-containing cylinder is made of netting` and arranged to rotate in one direction while a second cylinder surrounding the first, with an ail-space between them, is madeto rotatein an opposite direction, and said cylinder is provided with wings or ribs to force the air rapidly through the colee, whereby the coiee is browned and roasted more rapidly by means of the heated air, and on account of this rapid browning and roasting the shrinkage in the coffee is reduced to a minimum, and, furthermore, the outer cylinder may be heated to a greater degrec than would be practicable where a single cylinder is used.

My further object is to provide means wherei by the air is forced rapidly through the inner cylinder and the eoifee contained therein by means of an outer cylinder, and, further, to provide means whereby the waste from the coffee may be separated therefrom while the coffee is being roasted and be discharged into the fire.

)ly inventionccnsists in certain details in the construction, arrangement, and combination ol' the various parts ofthe device whereby the objects contemplated are attained,as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanyingr drawings, in Whichlfhrnre l shows a vertical central longichine.

chine with the lower portion of the fire-box removed. Fig. shows a vertical transverse sectional view of the complete machine.

Referring to the accompanying drawings, l have used the reference-numeral lt'tindicate the rear end portieri of the housing and 1l the front of same, said front beiner open at its central portion to permit the coffee-hold ing cylinder to project through it.- rlhe numeral l2 indicates a sheet-metal cover secured to the endsto incluse the entire ma- At its top is an opening 13, through which the products of combustion may escape, and in the bottom of the housinr is a iire-box 14, open at its top, and an ash-pit 15 below the lire-box.

The reference-.numeral 1G indicatesa huh rotatably mounted in the center of the end 10. On the rear end ot' the hub 1li is a beltwheel 17, and on the front end thereof is an annular flange 18, to which a circular sheetmetal head 1) is fixed. Riveted to the head 19 is a sheet-metal cylinder 20,- projecting forwardly to a point adjacent to the front 11. This cylinder is provided with a series of openings 2l near its rear edge, and on this` inner surface is a spiral rib 22. The other edge of the cylinder 2O is supported in such a manner as to be capable of free rotation by means of the rollers 22S, which rollers are fixed to the short rods 2l, which pass through the front 1l, and have their bearings in the boxes 25, which are formed on or iixed to the outer surface of the front 11.

4 It is obvious from the construction j ust described that a belt applied to the wheel 17 will rotate the cylinder 2O and that the spiral rib 22 will serve the double function of a fan and a screw to force substances rearwardly to the discharge-openings 2l.

l have `mounted in the hub 16 a shaft 26, passed through the hub and extending to the front of the machine. On the re'ar end of the shaft QG'is a belt-wheel 27, and fixed to the shaft are two cast-metal heads 28, the front one of said heads being provided with an opening), through which access may be had to th'e space between the heads. 'lhe said front head also project a slight distance in advance of the `front 11. -Fixed to the heads 2S is a cylinder 30, whichjs preferably made of netting formed of aluminium wire. On the interior of the cylinder 30 is a spiral rib Sl, extending substantially from one end to the other, and inside of the spiral rib 31 isasecond spiral rib 32,\vhich also extends from one end to thc other in an opposite direction. 'lhis form ofthe double spiral is nowin common use in coffee-masters and serves the function of continually moving the coffee from one end to the other.

In practical use, and assuming the parts to be arranged substantially `built inthe iii'e-box 14, and thegreen-coffee is placed in the cylinder 30. Then poweris applied to the belt-wheels 17 and 27 to turn them inoppositedirections. Obvionslythecylnder 2o may be heated to a comparatively greater degree, and the heated airon the innersurface of said cylinder will be constantly kept in inotion bythe spiral rib Hence the air inside `of this cylinder may b e heated to a greater de- .grce than is'possible with the stationary cylinder ora cylinder not provided with a spiral rib 22. 0n account of the well-lcnown fact 'that a body of dead air cannot be heated as quickly or as thoroughly a body of air that is continuously kept in motion this current of heated air is rapidly forced through the scrccncylindcr 30 and the coffee contained therein. Hence the coffee will be browned and roasted in a minimum of time, and the alum inium-wire netting will reduce the probability of burning the coffee to a minimum. Furthermore, the hulls and dust in the colee will be separated therefrom and discharged into the fire, vand the steam which accu|nulates in the outer cylinder may escape outwardly through the same openings.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States therefor, is-

l. An improved coffee-master, comprising,

mounted within the first, with a space between them, and capable ol.' rotation in a direction opposite from that of thc first one.

as shown, a fire is l l if,

2. An improved coffce-roastcr comprising,

in combination, a housing, a rotatable cylin der mounted in the housing, and a second rotating cylinder designed to contain colfec mounted within the first with a space between them anda Wing or rib in the space between the cylinders. i

3. An improved coffee-roaster comprising, in combination, a housing, a rotatable cylinder mounted in the housing, and a second rotating cylinder designed to contain the coffee mounted within the first with a space between them and capable of rotation in a direction opposite from that of the first one, and aspiral rib on the inner'surface of the outer cylinder -for the 'purposes stated. y

4. An improved coffee-master comprising, in combination, a housing, a lire-box in the lower portion thereof, a rotatable hub mount-` ed in the-rear end of the housing, a belt-wheel on one end of said hub and a cylinder-head on the other end thercof,-a sheet; metal cylinder fixed to said head having openings near its rear edge, rollers for supporting the forward end of the said cylinder', a hub secured to the said cylinder, a rotating shaft ih said hub capahleof turning relative to the hub, a

belt-wheel thereon metal cylinder-heads fixed.

to said shaft and a cylinder made of netting connected with said heads to operate in the manner set forth for the purposes stated.

EDGAR' LINAHERRY. SVitnesses:

- l JNO. L. MARTIN, v

.LRALPH Onwo. 

